package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.sky.constant.MessageConstant;
import com.sky.dto.UserLoginDTO;
import com.sky.entity.User;
import com.sky.exception.LoginFailedException;
import com.sky.mapper.UserMapper;
import com.sky.properties.WeChatProperties;
import com.sky.result.Result;
import com.sky.service.UserService;
import com.sky.utils.HttpClientUtil;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.HashMap;
import java.util.Map;

@Service
@Slf4j
public class UserServiceImpl implements UserService {

    @Autowired
    private WeChatProperties weChatProperties;
    @Autowired
    private UserMapper userMapper;

    public static final String WX_Login="https://api.weixin.qq.com/sns/jscode2session";
    @Override
    public User wxlogin(UserLoginDTO userLoginDTO) {
        //调用微信接口，获取微信用户的openid

      String openid=getOpenid(userLoginDTO.getCode());

        //判断openid是否为空，若为空，抛出异常
        if(openid == null){
            throw new LoginFailedException(MessageConstant.LOGIN_FAILED);
        }
        //非空，判断该用户是否为新用户
        User user=userMapper.getByOpenid(openid);
        if(user == null){
            user=User.builder()
                    .openid(openid)
                    .createTime(LocalDateTime.now())
                    .build();
            userMapper.insert(user);
        }
        //若为新用户，自动完成注册
        //返回这个用户对象
        return user;
    }
    public String getOpenid(String code){
        Map<String, String> map=new HashMap<>();
        map.put("appid",weChatProperties.getAppid());
        map.put("secret",weChatProperties.getSecret());
        map.put("js_code",code);
        map.put("grant_type","authorization_code");
        //发送请求
        String json=HttpClientUtil.doGet(WX_Login,map);
        //接受数据
        JSONObject jsonObject= JSON.parseObject(json);
        String openid = jsonObject.getString("openid");//JSON讲JSON格式转化为Java对象
        return openid;
    }
}
